Spark cartridge



FIG. 1 is a front perspective view of the new design;

FIG. 2 is a front elevational view of the design shown in FIG. 1;

FIG. 3 is a rear elevational view of the design shown in FIG. 1;

FIG. 4 is a top plan view of design FIG. 1;

FIG. 5 is a bottom plan view of design FIG. 1;

FIG. 6 is a left side view of design FIG. 1;

FIG. 7 is a right side view of design FIG. 1; and,

FIG. 8 is a reduced environmental perspective view of the spark cartridge of FIG. 1 attached to a scooter.

The phantom lines are provided for illustrative purposes only and do not form part of the claimed design. 

The ornamental design for a spark cartridge, as shown and described. 